SB2021042802 - Multiple vulnerabilities in Apple iCloud for Windows

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021042802

SB2021042802 - Multiple vulnerabilities in Apple iCloud for Windows

Published: April 28, 2021

Security Bulletin ID SB2021042802
Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 75% Low 25%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Improper Initialization (CVE-ID: CVE-2021-1857)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to improper initialization within the CFNetwork component when processing crafted web content. A remote attacker can trick the victim to open a specially crafted webpage, trigger memory corruption and gain access to sensitive information.


2) Out-of-bounds read (CVE-ID: CVE-2021-1811)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the CoreText component when processing specially crafted font files. A remote attacker can create a specially crafted font file, trick the victim into opening a document or a web page that contains the malicious font, trigger out-of-bounds read error and read contents of memory on the system.


3) Universal cross-site scripting (CVE-ID: CVE-2021-1825)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


4) Use-after-free (CVE-ID: CVE-2020-7463)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error when processing SCTP messages. A local user can send large user messages from multiple threads on the same socket., trigger a use-after-free error and crash the system.



Remediation

Install update from vendor's website.

References